l = [1,6,3,4,3,5,6,0,7,2,1]


def unqify_list_preserving_order(l):
    unique_l = []
    [unique_l.append(i) for i in l if not unique_l.count(i)]
    return unique_l


print(l)
print(unqify_list_preserving_order(l))
